Rolling mill



Aug. 9 1927.

1,638,463 T. A. SCHRAISHUHN v ROLLING MILL 5 Sheets-$heot 1 Filed July 23. 1926 FIG.

INVENTOR Theodore A.5c/1ra.[shuh-n .by 47% a 77% his aJfar-neq Aug. 9 1927.

1,638,463 T. A. SCHRAISHUHN ROLLING MILL Filed July 23, 1926 5 Sheets-Sheet 2 FHS.

INVENTOR his aJHorneL 1927- r. A. 'SCHRAISHUHN ROLLING MI LL Filed July23. 192s 5 Sheets-Sheet 3 FIG. 3

INVENTOR Theodore A. Sch-125M117? his afTorneq 1,638,463 T. A. SCHRAISHUHN ROLLING MILL Aug. 9, 1927.

Filed July 23, 1926 5 sheets-shut 4 Ii 1/1 II 1 1/1 IIJ 1/ FIG. 5

N' u I i iNvsNToR I Theodore A. Schrais I'm/111 his affarney ROLLING MILL Filed July23. 1926 5 Sheets-Shoot 5 Theodore A.Schra.2s hU LTI his ajfarney Patented Aug. 9, 1927.

UNITED STATES THEODORE A. SCHRAISHUHN, OF G FOUNDRY & MACHINE COMP Applica This invention relates to a rolling mill, present invention; Figure 2 PATENT) OFFICE.

ORAOPOLIS, PENNSYLVANIA, ASSIG-NOR TO LEWIS ANY A CORPORATION OF PENNSYLVANIA.

ROLLING MILL.

tion filed July 23, 1926. Serial No. 124,349.

is a front eleand particularly to a mill for the cold formvation of the mill, that is an elevation of the ing of metallic shapes by bending the stock metal.

A mill of the type a continuous mill the stock being progressively formed in the successive passes of the For various classes of it a greater number of pairs of die spindles than is necessary for other classes of work.

For this reason it is of advantage that the general arrangement of the mill be by units,

so that a greater or e machine as a whole,

1 spindles may be provided ina machine fundamental deand that a manufactured machine may be adapted to various classes of removal of a unit or units.

One object a forming mill which connections are employed work by the addition or of the invention is to provide compact driving to actuate all of the unitsyof the mill from a common driving shaft.

Another object of the invention is to so arrange the driving connectlons and houslngs of each. the units are held against ment in one direction, and

ment of the driving gears unit that the die spindles of horizontal moverelative displaceavoided, without the provision of locking collars or similar fastening means.

A closely related object of the invention which out the use of spacing collars or other spac ing means.

Another object of the invention is to provide a forming mill arranged as to of unit construction so allow space between ad acent pairs of spindles for the insertion of side dies or guides of any desired form,

side die or guide holding an easy adjustment of the frame both vertically and laterallyof the mill.

In the accompanying drawings Figure 1 and 21 for the upper splndles 7.

is a plan view of the forming mill of the of forming mill units comprises .a rear housing shaped stands 2, and a front housing 3 comside opposite to that on which the driving connections are disposed; Figure 3 is a rear noted is operated as elevation of one of the units ofthe forming mill; Figure 4 is a cross sectional view through one of the units onthe line 4-4 Fig. 3; Figure 5 is a horizontal sectional Viewt-hrough the unit on the line 5 5 of Fig. 3; Figure 6 is a detail plan view .of the immediate driving connections for the spindles of the unit; Figure 7 is a detail elevation of the structure shown in Figure 6;

lesser number of die Figure 8 is a detail rear elevation of a single spindle stand, showing the adjusting means for the side guide or die frame; and Figure 9 is a vertical sectional view on the line 99 of Fig. 8. I c

As shown in Figures 1 and 2, a plurality A are mounted on a common base or table 1. Each of the units formed of two U- prising two U-shaped stands 4, which may be interconnected by any suitable members such as a bolted saddle 3, and bolted bracket 3 Bearings 5 and 6 for the upper spindles 7 and lower spindles 8 are supported by the front and rear stands of the unit.

All the spindles of a complete machine are driven from a line shaft 9, actuated by suitable means, such as an electric motor 10. At the rear of each unit is a casing 11, is secured to the stands forming the rear housing of the unlt, and which contains the immediate driving'connections for. the spindles of that unit. Such immediate driving connections comprise a unit driving shaft 12, which carries a worm gear 13 meshing with a worm 14 on the line shaft 9.

The unit driving shaft 12 carries a double helical gear 15, with the outer section of which mesh the driving gears 16 and 17 for the two lower spindles 8.

With the inner section of the double helical gear 15 mesh idler pinions 18 and 19, which in turn mesh with driving gears '20 Bearings 5 are vertically adjustable by means of adjusting screws 22, which are shown as of usual form. In order that the centers of the idler gears 18 and 19 and upper spindle gears 20 and 21 may be aligned irrespective ofthe adjustment of the upper spindles, special mounting means are provided for the idlers. Such mounting means comprise brackets 23 and 24, which are free on the unit drive shaft 12. These brackets provide bearings for the shafts 25 of the idlers 18 and 19. On shafts 25 are links 26 and 27, which are secured to the extremities of the spindles 7.

The idler mounting arrangement provides for the adjustment of the upper spindles without affecting the relative centers of their driving gears. The use of the double helical gear permits the gears for the upper and ,V

gaging threaded rods or shafts 42. These lower spindles to be identical in structure,

so that they are interchangeable in the unit.

With the helical gear arrangement as shown and described, the driving thrust is in opposite directions on the lower spindles 8 and upper spindles 7. The upper pinions 20 and 21, and upper spindles 7, are held against outward thrust by the links 23 and 24 and the links 26 and 27. The direction of rotation of the gear 15 should therefore be clockwise, so that an inward thrust is exerted on the lower pinions 16 and 1'7 and lower spindles '8. Unmeshing of the gears or undesired .horizontal movement of the spindles is thus'prevented by the linkage in the case of the upper spindles and by the inwardly directed driving thrust in the case of the lower spindles. There are therefore no locking'means between the rolls and front stands to be unfastened as a'preliminary step in moving the front stands 4 toward and from rear stands 2,

In order to prepare a unit for the particular work to be done, it is merely necessary to loosen'bolts 30 in a cover plate 4 and slide the housings 4 completely off the table 1. Thedies are then slid onto the spindles 7 'and 8 and the front housings replaced. In replacing a front housing a stand 4 slides rearwardly of the spindles on the guide.

' strips 29, and is locked in proper position with respect to the dies by means of fastening bolts 30. In each unit the front housing, comprising the two stands 4. may

be adjusted as a wholefor the stands may be adjusted one at a time by loosening bolts 33 in bracket 3 and saddle bolts 33 which secure the stands to a saddle 3 This simple manner of applying the dies to the spindles, and adjusting the front housing with respect to the rear housing and dies, avoids any necessity for the use of spacing collars or other spacing means, and greatly facilitates the preparation of the machine for 'use in making the part-icular form which is desired.

It will be noted that there is a space 34 between each of the stands of the entire machine. This space may be. occupied by a frame 35 for carrying side dies, guides, or rolls, these guide frames may be interposed throughout the entire length of the machine, or only at points where a guide or side forming action is particularly desirable in view of the work to be done.

Each. of the guide frames 35 is vertically adjustable by means of adjusting screws 36, which engage in the brackets 3 between stands 2 and 4, and which support the frame 35 by engagement with the upper portion 37 of the frame. The side die or guide holders 38 and 39 are slidable in ways 40 in the frame 35, and are shown in Figure 9 as carrying side roll shafts 41. The rear guide holder 38 has therein threaded orifices enshafts are rotated by means of pinions 43 meshing with a gear 44 on a hub 45 which carries a hand wheel 46. 'Interiorly of the hub 45 is an internally threaded sleeve 47 in which engages a threaded rod 48. This threaded rod 48 is connected with the front guide holder 39, and is provided with an individual hand wheel 49. 4

To adjust the guides for the desired work, the frame is adjusted vertically between the stands by means of the adjusting screws 36. Either or both of the guide holders 38 and 39 may then be laterally adjusted by means of one or both of the hand wheels 46 and 49.

To summarize the advantages of the machine; the unit construction renders it an easy matter to increase or decrease the effective length of the machine asa whole.

The special helical gear arrangement for each unit drive renders the driving gears for the spindles interchangeable, and avoids the necessity for any retaining means between the spindles themselves and their hearings in the front housing of the unit.

The lateral adjustment of the fronthousings avoids the use of spacing collars or other spacing means, and this adjustment is facilitated by the absence of any retaining, means between the spindles and the front housings. The guide frames are adjustable vertically without changing the position of j the front housings. and the position of the guide frames need not be changed because of lateral adjustment of the housings. The

guide frames themselves are so arranged that either or both of the guide and die holders therein may be accurately and independently adjusted.

These special advantages all cooperate in securing the general advantage of rendering a change of dies, and adjustment of the machine to a changed class of work, both simple and rapid.

,A further advantage of the helical gear arrangement is that the speed of the rolls may be accurately timed since there is no I the front spindle housings mounted on the base for movement laterally thereof, and guide frames mounted between c mprising a play due to absence of back lash. This is of great advantage where the dies carried by a pair of opposed upper and lower rolls are not identical but cooperate with each other in a certain definite manner to effect indentation of the stock in the forming operation.

What 1 claim is:

1. In a forming mill the combination of a base, a pair of housings on said base, a pair of spindles in said housings, a line shaft, a'driving shaft connected with said line shaft, a double helical gear on said driving shaft, a gear on one spindle meshing with one section of the double helical gear, and gear connections for the other spindle other section of the double helical gear. 4

2. In a forming mill the combination of a base, a pair of housings on said base, one of said housings being slidablymounted for movement transversely of the base, a pair of spindles in said housings, a line shaft, a driving shaft connected with said line shaft, a double helical gear on said driving shaft, a gear on one spindle meshing with one section of the double helical gear, and gear connections for the other spindle comprising a member meshing with the other section of the double helical. gear.

' 3. In a forming mill the combination of a base, a pair of housings on said base, a pair of spindles in saidhousings, a line shaft, a driving shaft connected with said line shaft, a double helical gear on said driving shaft, a gear on one spindle meshing with one section of the double helical gear, a bracket freely mounted on the driving shaft, a shaft in said bracket, said shaft with the other spindle, an idler gear on said bracket shaft and meshing with the other section of said double helical gear, and a gear on the spindle meshing with said idler gear.

'4. In a forming mill the combination of a base, a plurality of spindle stands providing front and rear spindlehousings on said base, being slidably spindle stands and adjustable vertically therein.

5. In a forming mill the combination of a base, a plurality of spindle stands providing front and rear spindle housings on said base, the front spindle housings being slidably mounted on said base for movement laterally thereof, guide framesmounted between spindle stands and adjustable vertically thereof, and guide holders independently adjustable in said frame.

6. In a forming mill the combination of a base, .a plurality of spindle stands providing front and rear spindle housings on said base, the front spindle housings being slidably member meshing with the a link connecting mounted on the base for movement laterally thereof, a line shaft, independent driving connections from the line shaft to each of a plurality of groups comprising two pairs of opposed spindles, guide frames mounted bea line shaft, a driving shaft connected with said line shaft, a gear on one spindle meshing with said drivin gear, a bracket freely mounted on therd'riving shaft, a shaft in said bracket, a link connecting said shaft with the other spindle, an idler gear on said bracket shaft and meshing with the driving gear, a gear, on the spindle meshing with said idler gear, guide frames vmounted between spindle stands and adjustable verti cally thereof, and guide holders independently adjustable in said frames.

8. In a forming mill the combination of a base, a plurality of spindle stands providing front and rear housings on said base, a pair of spindles in each pair of said stands. a line shaft, a drivingshaft connected with said line shaft, a double helical gear on said driving shaft, a gear on one spindle meshing with one section of the double helical gear, gear connections forthe other spindle comprising a member meshing with the other section of the double helical gear, guide frames mounted between spindlestands and adjustable vertically thereof, and guide holders independently adjustable in said frames.

9. In a forming mill the combination of a base, a plurality of spindle stands providing front and rear housings on said base, a pair of spindles in each pair of said stands, a line shaft, a driving shaft connected with said line shaft, a double helical gear ing shaft, a gear on one spindle meshing with one section of the double helical gear, gear connections for the other spindle comprising a member meshing with; the other section of the double helical gear, guide' frames mounted between spindle stands and adjustable vertically thereof,, and guide holders independently adjustable in said frames. K

10. A guide frame construction for a rolling mill comprising a supporting bracket, frame members having longitudinal ways therein, a guide holder adjustable in said ways, a pair of adjusting screws having a threaded engagementwith said guide holder, a second 'de holder adjustable in said ways, an a single adjusting screw connected with said second guide holderand arranged for longitudinal movement therewith.

spindle stands providon said driv- 11. A guide frame construction for a rollguide holder adjustable in said Ways, and ing mill comprising a supporting bracket, an adjusting screw having a threaded enframe members having longitudinal \va-ys gagement in the hub for adjustingthe positherein, a guide holder adjustable in said tion of said second guide holder.

ways, a pair of adjusting screws, a hub in In Witness whereof, I hereunto set my said frame, gear connections with said hub hand.

for actuating said adjusting screws, a second THEODORE A. SCI-IRAISHUHN. 

